Question

Simplify: (√3+√7) (√3-√7).​

Answer 1

answer of these question is (-4)

Answer 2

$(a + b)(a - b) = {a }^{2} - {b }^{2} \\ ( \sqrt{3} + \sqrt{7} )( \sqrt{3} - \sqrt{7} ) = \sqrt{3 {}^{2} } - \sqrt{7 {}^{2} } \\ 3 - 7 = - 4$

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